Packing for turbines.



A. BONOM. PACKING Foa TURBINES. APPLICATION FILED 113.151.1918.

1,291,383. Patented Jan.14,1919.

ALFRED BONOM, OF PATERSON, NEW JERSEY.

PACKING FOR `'.I'URBINESl Specification of Letters Patent.

Patented Jan. 14, 1919.

Application led February 15, 19125. Serial No. 217,365.

To all Awhom t may concern:

Be it known that I, ALFRED BoNoM, a citizen of France, and a resident of Paterson, in the county of Passaic and State of New Jersey, have invented a new and llmproved Packing for Turbines, of which the following is a full, clear, and eXact description. 1

My invention relates to a packing accessible from the side of a turbine, as distinguished from a packing accessible from the end. This packing is particularly adaptable to reversible turbines in which the inlet end of the casing has an additional support and wherein it is undesirable to disturb the bear ing of the rotors of the turbine when changing the packing.

An object of the invention is to provide a simple and inexpensive packing' which can be easily and quickly replaced.

Another object of the invention is to provide a packing in which the packing members are retained against their seat under a static pressure of a compressible fluid.

With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts as herein fully described, illustrated and claimed.

lin the accompanying drawings, forming part of the application, similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a fragmentary axial section through a turbine equipped with a. packing embodying my invention;

ig. 2, a cross section on line Qf-2, Fig. 1; an

Fig. 3, a cross section on line 3-3, Fig. 1.

Referring to the drawings, 4c is the housing of the turbine and 5 is an extension of the housing provided with a `steam inlet 6. The extension 5 is separated from the housing l by a ring v7 formed in halves so that the ring can be removed laterally in sections. The ring 7 has an inner annular' groove 8 which communicates with the side faces of said ring by means of apertures 9 provided in the sides of the ring near the bottom of the groove, as best seen in Fig. 3. The purpose ofthis will appear hereinafter, The ring 7 is retained in position between the housing and the extension 5 by bolts 10 which secure the extension to the housing.

lThe housing and extension have annular recesses 11 facing the sides of the ring 7 and which recesses are adapted to accommodate packing members 12 and glands 13. The glands 13 are in the shape of a ring formed of sections, each section being operable by means of a screw 14, which screws project out of the extension and housing, as shown best in Fig. 2.

When the ring 7 is removed from between the housing and the extension, access may be had to the recesses 11 and, therefore, the packing 12 can be easily placed into position and also the sections of the gland. The sections of the gland when engaging the packing material 12 are below the openings 9, so that the compressible fluid will enter into the recesses 11 above the glands. The sections of the glands are preferably provided with flanges at the extremities to bet ter guide said sections within the recesses l1. These flanges and portions which are engagedby the screws la provide spaces 15 in said recesses which communicate with the groove 8 of the ring 7 through the apertures 9 in said ring. The screws 1dretain the sections of the glands 13 on the packing material 12 so that the ring 7 can be easily placed into position.

By admitting steam into the groove 8 of the ring 7 through the livesteam inlet 16, a static pressure is applied to the glands and the packing material will be forced against the sleeve 17 which is constrained to revolve with the outer rotor 18 of the turbine. The outlet chamber 19 between the outer rotor and the housing 4 communicates with a clearance 20 formed by the outer rotor and the housing 4, and which clearance is separated from the live-steam inlet 6 of the tur bine by the packing above described.

From the above description it will be seen that in my packing the inner peripheral chamber 8 in the ring 7 serves as a reservoir for storing pressure, which pressure drives the packing members or material into engagement with the sleeve 17 and thereby prevents leakage from the inlet of the tur bine and the clearance 20 which conm'lunicates with the outlet. ln view of the fact that the static pressure within the chamber is equal to the dynamic pressure'in the inlet there is little tendency for the live steam passing through the inlet to leak along the packing material l2 in proximity thereof, for in addition to the pressure of the steam on the packing material, the pressure of the screws may be added, which will insure a perfectly tight joint between the packing material and the sleeve.

I claim:

l. In a packing of the class described, a

sectional ring having an inner annular chamber for receiving a fluid under pressure, an annular packing member disposed on each side of the ring, annular glands encompassing the packing members, and means for retaining` the glands in engagement with the packing members, said ring having apertures in the sides thereof leading from above the glands so that the glands are subject to the pressure in the chamber.

. 2. In a. packing of the class described, a sectional ring having an inner annular chamber for receiving a fluid under pressure, an annular packing member on each side of the ring, annular sectional glands encompassing theV packing members, and means for retaining each of the sections of a gland in engagement with a corresponding packing member, said ring having apertures in the sides thereof leading from above the sections of the annular glands so that the said sections `are subject. to the pressure within the chamber.

3. In a packing of the class described, a sectional ring having an inner annular chamber for receiving a fluid under pressure, an annular packing member on each Side of the ring, an annular sectional gland also to each side of the ring, and means foreach of said gland sections for maintaining the same in engagement with a corresponding packing member, said ring having means to subject said gland sections to the pressure in the chamber of the ring to force said gland sections radially on. to the pac-king members.

4f. A packing for a turbine comprising a housing having an annular gap, a ring fit` ting into said gap and havingan inner annular chamber for receiving a fluid under pressure, said housing having annular recesses onveach side of the ring, and packing members in said recesses, said ring having means for establishing communication between the chamber and the recesses to subject the packing members in the recesses to an inward radial pressure substantially as and for the purpose set forth'. 5. A packing Yfor turbines comprising a housing having an annular gap, a sectional ring fit-ting into the gap, said housing having annular recesses on each side of the ring,

Vpacking members in said recesses, sectional packing glands in said recesses encompass ing the packing members, and means for forcingtradially each of the sections of the glands, said ring having an inner annular chamber for receiving a fluid under pressure, and meansn said ring .for admitting the fluid into the annulai` recesses of the housing outside of said gland sections so as to force said sections radially inward substantially as and for the purpose set forth.

G. A packing for turbines comprising in combination a housing having an annular 0ap, a sectional ring fitting into the gap, Bolts for securing the ring sections to the housing adapted to run transversely of the plane of the ring, said housing having` annular recesses on each side of the ring. :n1 annular packing member in each of the rocesses, an annular sectional gland in each of the recesses encompassing the packing inember, and ay screw for each of the sections to maintain the saine against. the packing niember, said sectional ring having an inner annular chamber adapted to receive a fluid under pressure` said ring having also apertures in the sides thereof establishing coinmunication between the chamber and the nnnular recesses of the housing to admit the fluid into said recesses above the gland sections.

In combination with the housing of a turbineand an extension for same having a steam inlet, a sectional ring adapted to fit between the housing and the extension, bolts for securing the ring sections to the housingand extension, said housing having an annular recess facing the ring sections, said extension having an annular recess also facing` the ring sections, an annular packing member in each of the recesses, an annular sectional gland in each of the recesses encompassing the packing membei', and means associated with the housing, extension :unf the glands for maintaining said gland sections against the packing members, said sectional ring having an inner annular chainh ber adapted to receive a fluid under pressure, said ring having also apertures in the side thereof for establishing communication bctween the chamber and the annular recesses of the housing and extension to admit the fluid into the said recesses above the gland sections.

S. In combination, a housing, a rotor in said housing, a housing extension having a steam inlet, a sleeve carried by the rotor and extending into the housing extension, a sectional ring interposed between the housing and the extension and encompassing` said sleeve, means for locking said sectional ring between the extension and the housing, packing means disposed to each side of said ring within the housing and the extension, said packing encompassing the sleeve, and means for subjecting said packing to a fluid under pressure and causing the same to inove Y radially against the sleeve.

ALFRED BONOM.

Qopies of thispatentimayrbe obtained for ve cents each, by addressing the Commissioner of Patents,

Y i Washington, D. G. 

